The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment

B. Kaminsky; A. Evans; Ya V. Pavlenko; C. E. Woodward; D. P.K. Banerjee; R. D. Gehrz; F. Walter; S. Starrfield; I. Ilyin; K. G. Strassmeier; R. M. Wagner

doi:10.1093/mnras/stac2199

The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment

B. Kaminsky, A. Evans, Ya V. Pavlenko, C. E. Woodward, D. P.K. Banerjee, R. D. Gehrz, F. Walter, S. Starrfield, I. Ilyin, K. G. Strassmeier, R. M. Wagner

Physics and Astronomy (Twin Cities)

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Abstract

We present an analysis of the red giant component of the recurrent nova V3890 Sgr, using data obtained before and after its 2019 eruption. Its effective temperature is Teff = 3050 ± 200 K for log g = 0.7, although there are modest changes in Teff. There is an overabundance of both carbon (0.20 ± 0.05 dex) and sodium (1.0 ± 0.3 dex) relative to their solar values, possibly the result of ejecta from the 1990 nova eruption being entrained into the red giant photosphere. We find 12C/13C =25 ± 2, a value similar to that found in red giants in other recurrent novae. The interpretation of the quiescent spectrum in the 5-38 μm region requires the presence of photospheric SiO absorption and cool (∼400 K) dust in the red giant environment. The spectrum in the region of the Na i D lines is complex, and includes at least six interstellar components, together with likely evidence for interaction between ejecta from the 2019 eruption and material accumulated in the plane of the binary. Three recurrent novae with giant secondaries have been shown to have environments with different dust content, but photospheres with similar 12C/13C ratios. The SiO fundamental bands most likely have a photospheric origin in the all three stars.

Original language	English (US)
Pages (from-to)	6064-6076
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	517
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stac2199
State	Published - Dec 1 2022

Bibliographical note

Funding Information:
This study was funded as part of the routine financing programme for institutes of the National Academy of Sciences of Ukraine. YP gratefully acknowledges the hospitality of the Nicolaus Copernicus Astronomical Center, Toruń, and support from grant 2017/27/B/ST9/01128 financed by the Polish National Science Center, while this work was being completed. DPKB is supported by a CSIR Emeritus Scientist grant-in-aid and is being hosted by the Physical Research Laboratory, Ahmedabad. RDG was supported by the National Aeronautics and Space Administration (NASA) and the United States Air Force (USAF). FMW acknowledges support of the US taxpayers through NSF grant 1611443.

Publisher Copyright:
© 2022 The Author(s).

Keywords

circumstellar matter
infrared: stars
novae, cataclysmic variables
stars: AGB and post-AGB
stars: abundances
tars: individual: V3890 Sgr

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Kaminsky, B., Evans, A., Pavlenko, Y. V., Woodward, C. E., Banerjee, D. P. K., Gehrz, R. D., Walter, F., Starrfield, S., Ilyin, I., Strassmeier, K. G., & Wagner, R. M. (2022). The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment. Monthly Notices of the Royal Astronomical Society, 517(4), 6064-6076. https://doi.org/10.1093/mnras/stac2199

Kaminsky, B, Evans, A, Pavlenko, YV, Woodward, CE, Banerjee, DPK, Gehrz, RD, Walter, F, Starrfield, S, Ilyin, I, Strassmeier, KG & Wagner, RM 2022, 'The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment', Monthly Notices of the Royal Astronomical Society, vol. 517, no. 4, pp. 6064-6076. https://doi.org/10.1093/mnras/stac2199

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abstract = "We present an analysis of the red giant component of the recurrent nova V3890 Sgr, using data obtained before and after its 2019 eruption. Its effective temperature is Teff = 3050 ± 200 K for log g = 0.7, although there are modest changes in Teff. There is an overabundance of both carbon (0.20 ± 0.05 dex) and sodium (1.0 ± 0.3 dex) relative to their solar values, possibly the result of ejecta from the 1990 nova eruption being entrained into the red giant photosphere. We find 12C/13C =25 ± 2, a value similar to that found in red giants in other recurrent novae. The interpretation of the quiescent spectrum in the 5-38 μm region requires the presence of photospheric SiO absorption and cool (∼400 K) dust in the red giant environment. The spectrum in the region of the Na i D lines is complex, and includes at least six interstellar components, together with likely evidence for interaction between ejecta from the 2019 eruption and material accumulated in the plane of the binary. Three recurrent novae with giant secondaries have been shown to have environments with different dust content, but photospheres with similar 12C/13C ratios. The SiO fundamental bands most likely have a photospheric origin in the all three stars.",

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note = "Funding Information: This study was funded as part of the routine financing programme for institutes of the National Academy of Sciences of Ukraine. YP gratefully acknowledges the hospitality of the Nicolaus Copernicus Astronomical Center, Toru{\'n}, and support from grant 2017/27/B/ST9/01128 financed by the Polish National Science Center, while this work was being completed. DPKB is supported by a CSIR Emeritus Scientist grant-in-aid and is being hosted by the Physical Research Laboratory, Ahmedabad. RDG was supported by the National Aeronautics and Space Administration (NASA) and the United States Air Force (USAF). FMW acknowledges support of the US taxpayers through NSF grant 1611443. Publisher Copyright: {\textcopyright} 2022 The Author(s).",

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AU - Pavlenko, Ya V.

AU - Woodward, C. E.

AU - Banerjee, D. P.K.

AU - Gehrz, R. D.

AU - Walter, F.

AU - Starrfield, S.

AU - Ilyin, I.

AU - Strassmeier, K. G.

AU - Wagner, R. M.

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N2 - We present an analysis of the red giant component of the recurrent nova V3890 Sgr, using data obtained before and after its 2019 eruption. Its effective temperature is Teff = 3050 ± 200 K for log g = 0.7, although there are modest changes in Teff. There is an overabundance of both carbon (0.20 ± 0.05 dex) and sodium (1.0 ± 0.3 dex) relative to their solar values, possibly the result of ejecta from the 1990 nova eruption being entrained into the red giant photosphere. We find 12C/13C =25 ± 2, a value similar to that found in red giants in other recurrent novae. The interpretation of the quiescent spectrum in the 5-38 μm region requires the presence of photospheric SiO absorption and cool (∼400 K) dust in the red giant environment. The spectrum in the region of the Na i D lines is complex, and includes at least six interstellar components, together with likely evidence for interaction between ejecta from the 2019 eruption and material accumulated in the plane of the binary. Three recurrent novae with giant secondaries have been shown to have environments with different dust content, but photospheres with similar 12C/13C ratios. The SiO fundamental bands most likely have a photospheric origin in the all three stars.

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KW - stars: AGB and post-AGB

KW - stars: abundances

KW - tars: individual: V3890 Sgr

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The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment

Abstract

Bibliographical note

Keywords

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